Don't let the interviewers at UW intimidate you. There's a good chance that they'll try to get a rise out of you, but they're just trying to find out what makes you tick. Stay cool....
I am a bit nervous about the UW one mainly because I had a really bad experience there when I applied previously. I am VERY excited about OHSU- gotta love Portland, and I've heard their students are really happy. I don't know if the same could be said for UW.